Engine-indicator



A. 0. BENECKE.

ENGINE ENDICATOR. APPLICATION FILED JAN. 8, 1915. RENEWED sEPT.2s. 1919.

Patented Apr. 13, 192i).

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ADELBERT 0. BENEGKE, or Bosron, 1

GAGE & VALVE COMPANY, OF

ENGIIQTEJNIOICATOR.

Application filed January 8, 1915, Serial No. 1,201.

To all whom it may concern:

Be it known that l, ADELBERT O. Bnnnonn, a citizen of the llnited States and a resident of Boston, in the county of Suffolk and State of lllassachusetts have invented certain new and useful Improvements in llngine-lndicators of which the following is a specification.

T his invention relates to that form of engine indicators in which the pencil mechanism is operated by a piston and the pencil travels vertically along the surface of a reciprocating drum and the object of tie invention is to cushion the pencil directly and independently rather than by means of the resilient pencil arm heretofore employed.

The invention is illustrated by the accompanying drawings in which Figure l is a vertical central sectional view of an indicator;

l 2 is a plan .view of said mechanism looking from above; and

3 is a section on the line Fig. 1.

The steam cylinder 1 is furnished with the piston 2 and piston rod engao'ing at its upper end the pencil arm elpivoted at 5 to the support 6 rotatably mounted in the top or the steam cylinder casing "4'. The pencil arm a is slotted atS to slidingly engage the top of the piston. [rod 3 and is also slotted at its outer end 9 to slidingly engage the pencil holder 10. The support 6 is turnished on its outer end with projection 11 in which are mounted vertical paralle bars 12 furnishing a vertical ouideway for the pencil holder 10 and also lateral support tor the outer end of the pencil arm. This pencil holder comprises a tuluilar so clret 1 in which said pencil is slidingrly mounted beingflanged at its inner end to e ige a corresponding shoulder in said cylin and abutting against a spring 7A: disposed therein. T he support 6 is furnished with the handle 15 by which it may be manipulated and the cylinder casing; T is furnished with the adjustable stop 16 to limit the movement of aid support toward the drum 1?. ln operation the parts are so adjusted that when in the position shown in the drawings, the pencil, cushioned by spring 14:, impinges upon the chart being: held in that position by means of the handle 15, the pencil arm 4 being employed simply to raise and lower the pencil and not, as heretofore, also as a cushion, or yielding support therefor.

Specification of Letters Patent.

Patented Apr. 13, 1920.

, 1919. Serial No. 325,816.

I claim:

1. In an engine indicator of the character described, in combination, a cylinder; a piston therefor; piston. rod; a pencil mechanism support rotatably mounted on the cylinder and furnished with a vertical guideway; a pencil arm pivoted to the support and in slotted engagement with the piston rod; and a pencil in slotted engagement with the pencil arm and laterally confined by the guideway and verticz-illy movable therein.

In an engine indi ator of the character described, in combination, a cylinder; a piston therefor; a piston rod; a pencil mechaiisni support rotatahly iounted on the cylindcr and furnished with a vertical guideway; a pencil arm pivoted to the support and in slotted engagz ement with the piston rod; a pencil in slotted engagement with the pencil arm and laterally confined by the guideway and vertically movable therein; and a controlling spring for the pencil.

in an engine indicator of the character described in combination, a cylinder; a piston there-for; a piston red; a pencil mechanism support rotatably mounted on the cyl inder and furnished with a vertical guideway; a pencil arm pivoted to the support and in slotted engagement with the piston rod; a pencil in slotted engagement with the pencil arm and laterally confined by the guideway and .'ertically mo able therein; and ustahle means for limiting the rota tability oi the pencil mechanism support.

l. ln an engine indicator of the character described. in combination. a cylinder; a pis t therefor; a piston rod; a pencil mecha- "in support rotatably mounted on the cyll r and l nishod with a vertical guide- I, a pencil arm pivoted to the support and in slotted engr -ement with the piston rod; a pencil in SlOtu d engagement with the pencil arm and l l v confined by the fllllClQWEl-Y and vertically movable therein; a controlling: spring: tor the pencil; and adjustable means l' iiting the rotatability ot the pencil mechanism support.

ln testimony whereof l. have atlixed my signature in presence of two witnesses.

iiDELBEllT O. BENECKE.

ll itnesses GEORGE G. CLARK, RALPH W. FOSTER. 

